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A recycling process for waste PC materials

A waste and process technology, applied in the field of waste polycarbonate (PC) material recycling process, can solve the problems of low product added value, high energy consumption, complex plastic recycling process, etc., achieve fast dissolution, less consumption, The effect of low solvent consumption

Active Publication Date: 2015-08-26
SHUYE ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the plastic recycling process in the prior art is complicated, the energy consumption is high, and the added value of the product is low. Through reasonable parameter setting, a product with simple process flow, low energy consumption, and small solvent consumption is provided. Recycling process of waste PC materials with high performance

Method used

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  • A recycling process for waste PC materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The recovery process of waste polycarbonate material described in the present embodiment, comprises the steps:

[0038] (1) Collect waste polycarbonate bottles, add them to the pulverizer, and pulverize them to obtain waste particles with a particle size of 1-1.5cm;

[0039] (2) At room temperature, put the waste particles into an airtight container containing dichloromethane and stir for 30 minutes to dissolve the waste particles quickly and form a homogeneous solution. During the stirring process, control the mixture of waste particles and dichloromethane The temperature of the mixed solution does not exceed 35°C, and the weight ratio of dichloromethane to waste particles in this step is 1:10;

[0040] (3) Add activated carbon to the homogeneous solution to absorb the pigment in the homogeneous solution and the waste gas generated during the dissolution of waste particles. After stirring for 20 minutes, stand still to obtain a standing liquid, which is described in th...

Embodiment 2

[0046] (1) Collect waste polycarbonate bottles, add them to a pulverizer, and pulverize them to obtain waste particles with a particle size of 1.5 cm;

[0047] (2) At room temperature, put the waste particles into a closed container with dichloromethane and stir for 25 minutes to dissolve the waste particles quickly and form a homogeneous solution. During the stirring process, control the mixture of waste particles and dichloromethane The temperature of the mixed solution does not exceed 35°C, and the weight ratio of dichloromethane to waste particles in this step is 1:9;

[0048] (3) Add activated carbon to the homogeneous solution to absorb the pigment in the homogeneous solution and the exhaust gas generated during the dissolution of waste particles. After stirring for 18 minutes, stand still to obtain a standing liquid, which is described in this step The weight ratio of activated carbon to waste particles is 1:70;

[0049] (4) Add the static liquid to the first filter wi...

Embodiment 3

[0055] (1) Collect the waste polycarbonate film, add it to the pulverizer, and pulverize it to obtain waste particles with a particle size of 1-1.5cm;

[0056] (2) At room temperature, put the waste particles into a closed container with dichloromethane and stir for 35 minutes to quickly dissolve the waste particles to form a homogeneous solution. During the stirring process, control the mixture of waste particles and dichloromethane The temperature of the mixed solution does not exceed 35°C, and the weight ratio of dichloromethane to waste particles in this step is 1:12;

[0057] (3) Add activated carbon to the homogeneous solution to absorb the pigment in the homogeneous solution and the exhaust gas generated during the dissolution of waste particles. After stirring for 15 minutes, stand still to obtain a standing liquid, which is described in this step The weight ratio of activated carbon to waste particles is 1:200;

[0058] (4) Add the static liquid to the first filter w...

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Abstract

The invention discloses a process for recovering a waste polycarbonate (PC) material. The process is characterized by comprising the following steps of: crushing the waste PC material, dissolving the crushed PC material ion into an organic solvent to form a homogeneous solution; and adding an adsorbent into the homogeneous solution, discoloring and removing insoluble substances, and sequentially filtering and crystallizing to obtain the required crystallized PC material. According to the process for recovering the waste PC material, the recycled polyester intrinsic viscosity control technology, the crystallization technology and the impurity removal technology are realized, water is not required to be added in the whole process, the wastewater discharge is avoided, and the environmental pollution is reduced. The intrinsic viscosity of the recycled PC product reaches 0.77dL / g, the purity is 99.5 percent, and the recovered material reaches a novel level.

Description

technical field [0001] The invention relates to a recovery process of waste plastics, in particular to a recovery process of waste polycarbonate (PC) materials. Background technique [0002] Polycarbonate (PC) is a general term for a class of polymer compounds containing carbonate structures in their molecular chains and various materials based on it. Due to its colorless transparency and excellent impact resistance, it is widely used in automobiles. Manufacturing, medical equipment, aerospace, packaging, electronic appliances, optical lenses and other industries. With the rapid development of my country's polyester industry, the production and demand of PC materials are increasing day by day. At the same time, the amount of waste polycarbonate materials produced is also increasing. Although these waste polycarbonate PC materials The toxicity itself is not high, but because of its bulky size, and it is difficult to degrade under natural conditions, it not only has a great im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/08C08L69/00
CPCY02W30/701Y02W30/62
Inventor 林树光
Owner SHUYE ENVIRONMENTAL TECH CO LTD
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